Azomethine metal complex dyes

ABSTRACT

Metal-containing azomethine pigment dyes derived from 1 mole of an o-phenylenediamine and 2 moles of a Beta hydroxynaphthaldehyde which are useful for coloring printing inks, surface coatings, resins and the like.

United States Patent Gaeng et al.

AZOMETHINE METAL COMPLEX DYES Inventors: Manfred Gaeng, Bobenheim-Roxheim; Peter Dimroth, Ludwigshafen, both of Germany Assignee: Badische Anilin- & Soda-Fabrik Aktiengesellschaft, Land Rheinland- Pfalz, Germany Filed: Feb. 16, 1971 Appl. N0.: 115,829

Foreign Application Priority Data Feb. 20, 1970 Germany ..P 20 07 844.8

US. Cl. ..260/429 C, 106/288 Q, 106/292,

106/301, 260/429.9, 260/438.1, 260/439 R, 260/556 AR, 260/559 R int. Cl. ..C07j 3/08, C07j 3/06, C07j 15/00 Field of Search ..260/566 F, 429, 429.9, 439, 260/438.1

[ Aug. 29, 1972 Primary Examiner-Tobias E. Levow Assistant Examiner-A. P. Demers Attorney-Johnston, Root, OKeeife, Keil, Thompson & Shurtleff ABSTRACT Metal-containing azomethine pigment dyes derived from 1 mole of an o-phenylenediamine and 2 moles of a B-hydroxynaphthaldehyde which are useful for coloring printing inks, surface coatings, resins and the like.

2 Claims, No Drawings AZOMETHINE METAL COMPLEXDYES. The invention relates to metal complex dyes having the general formula (I): l

bromophenyl, methylphenyl, ethylphenyl, dimethylphenyl, methoxyphenyl, dimethoxyphenyl, ethoxyphenyl, methylmethoxyphenyl,-.

methylchlorophenyl, or methoxychlorophenyl.

Compounds having the formula (I) have .particular industrial importance when X therein is aradical having the formula: COM-l or SO NH and Medenotes a zinc atom or preferably a nickel atom.

Compounds having the formula (I) haveparticular industrial importance when X therein is a radical having the formula: CONH and Me denotes a zinc atom or preferably a nickel atom.

The new dyes are pigments having outstanding fast ness properties. They are suitable for the production of printing inks, surface coatings and for coloring plastics. They can be brought into the form most favorable for the purpose for which they are to be used by conven* tional finishing operations such as reprecipitation, grinding, swelling or the incorporation of additives.

2, The-compounds having the formula (I) may be prepared by reducing an o-nitraniline having the general formula (ll):

denoted by Me. i

I The invention is illustrated by the following Examples in which parts and percentages are by weight unless otherwise stated.

EXAMPLE 1 11 parts of 2-nitroanilinesulfonamide-(4) is hydrogenated in parts of ethylene glycol monomethyl ether with Raney nickel at atmospheric pressure. After the theoretical amount of hydrogen has been absorbed, the solution is suction filtered from the catalyst (the hydrogenation product is in solution) and the catalyst is washed withabout parts of glacial acetic acid. Thecombinedfiltrates are added to a solution of l7.2 parts of B-hydroxynaphthaldehyde in 150 parts of glacial acetic acid and boiled for 3 hours-under reflux. The whole is allowed to cooland the azomethine formed is suction filtered and washed with glacial acetic acid and methanol.

The 'moist filter cake is heated in 300 parts of ethylene glycol monomethyl ether with 12.5 parts of nickel acetate for 3 hours at reflux temperature. It is then allowed to cool to 50C and is suction filtered and washed with the'same solvent and hot water and dried. 24 parts of a yellowish red pigment is obtained having r AX! \N/ l,

HzNOgS EXAMPLE 2 EXAMPLE 3 Parts Metal acetate Parts of pigment Color 10 Cu(CH COO),.H,O 23.5 brown 12.5 Mn(CH,COO),.4H,O l brown 13.3 Cd(CH,COO ),.2H,() 18 orange 12.5 Co(CH COO) .4H,O 22 brownish orange EXAMPLE 4 13 parts of 3-nitro-4-aminobenzenesulfonylurea is hydrogenated in 100 parts of ethylene glycol monomethyl ether with Raney nickel at atmospheric pressure. After the theoretical amount of hydrogen has been absorbed, the catalyst is suction filtered and washed with 150 parts of glacial acetic acid. The combined filtrates are added to a solution of 17.2 parts of B- hydroxynaphthaldehyde in 150 parts of glacial acetic acid and boiled for 3 hours under reflux and then cooled. The precipitate is suction filtered and washed with glacial acetic acid and methanol.

The moist filter cake is boiled under reflux for 3 hours with 12.5 parts of nickel acetate in 300 parts of ethylene glycol monomethyl ether and then cooled to 50C. The precipitate is suction filtered and washed with ethylene glycol monomethyl ether and hot water, and dried. 20 parts of a yellowish red pigment is ob- \l N/ l EXAMPLE 5 The 2-nitroanilinesulfonamide in Example 1 is replaced by 14.7 parts of 2-nitroanilinesulfonanilide. 26 parts of an orange pigment is obtained which bears a SO,NHC,HC5-group instead of the sO Nl-l -group (see the formula in Example 1 17 parts of a yellowish brown pigment is obtained in a corresponding manner from 16.4 parts of 2- nitroanilinesulfon-p-chloroanilide.

EXAMPLE 6 9.1 parts of 2-nitroanilinebenzl amide nickel in parts of methanol. After the absorption of hydrogen has ended, the Raney nickel is suction filtered and washed with 100 parts by volume of glacial acetic acid. The filtrates are added to a solution of 17.2 parts of B-hydroxynaphthaldehyde in 200 parts by volume of glacial acetic acid and boiled under reflux for 3 hours. The precipitate is then suction filtered, washed with glacial acetic acid and methanol and the moist filter cake is heated under reflux for 3 hours in 400 parts of ethylene glycol monomethyl ether with 12.5 parts of nickel acetate. The whole is then allowed to cool to 50C and the precipitate is suction filtered and washed with methanol and hot water, and dried. 23 parts of a red pigment is obtained having the formula:

E Arylamide Paryl PP T 7 (1| Nnm: 5 Nllz me 25 is hydrogenated at atmospheric pressure with Raney Cl N02 EXAMPLE l2 5 parts of the pigment obtained according to Example 1 or 2 is triturated with 95 parts of acrylate resin coating material consisting of 80 parts of acrylate resin solution and 20 parts of melamine resin solution in an attrition mill. A deep red coating material is obtained which after having been baked for minutes at 130C exhibits outstanding fastness to light and overspraying.

By blending 2 parts of the abovementioned acrylate resin coating material with 20 parts of white coating material (consisting of 20 parts of TiO and 80 parts of acrylate resin coating material) a deep yellowish red coating material is obtained which after having been baked exhibits outstanding fastness to light and overspraying.

EXAMPLE 13 A mixture of 70 parts of polyvinyl chloride, 30 parts of dibutyl phthalate and 1 part of titanium dioxide is colored with 0.5 part of the pigment according to Example 11 by a conventional method, A red material is obtained from which, for example, film, sheeting and profiles may be prepared. The coloration is distinguished by excellent fastness to plasticizer and to light. Similar shades also having very good fastness properties are obtained when the pigments set out in the other Examples are used.

EXAMPLE 14 20 parts of the pigment according to Example 6 is triturated with letterpress or offset varnish on a threeroll mill by a conventional method. The printing ink prepared in this way gives prints having excellent color strength, fastness to light and brilliance when used in letterpress or offset printing. Printing inks having similar properties are obtained when the pigments specified in the other Examples are used.

We claim:

1. an azomethine metal complex dye having the general formula:

where X denotes a radical having the formula CONHR or SO NHR, Me denotes an atom of zinc, manganese, copper,

cobalt, cadmium or nickel, and R denotes a hydrogen atom or a phenyl radical which may bear alkyl, alkoxy, carbamoyl, sulfamido or halogen as a substituent, a naphthyl radical or a radical having the formula: CONH-C H CONHC H or CO--NH,. 2. A dye as claimed in claim 1 where X in the formula denotes a radical having the formula COM-l or SO NH and Me denotes a zinc atom or a nickel atom. 

2. A dye as claimed in claim 1 where X in the formula denotes a radical having the formula CONH2, or SO2NH2 and Me denotes a zinc atom or a nickel atom. 